Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds real value beyond that: it discloses the exact return contents (order as the account shows it), the cancel/reschedule eligibility signal, and the auth requirement (Cotlet API key with app access).

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded and reasonably short, but there is clear redundancy: the returned fields are listed twice ('tickets, price paid and whether it can be cancelled or rescheduled' then again as 'product, visit date, tickets, price paid and whether cancelling or rescheduling is on offer'). The second listing should have replaced the first rather than repeated it.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema exists, so the description must carry return-value burden and it does, enumerating the booking fields. It also covers the auth prerequisite. Only the repeated return listing and absence of any error/not-found behavior keep it from a 5.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and the single parameter is documented in the schema ('Order ID from list_bookings'), so the schema does the heavy lifting. The description adds no format, source, or constraint detail beyond the schema, matching the baseline for full coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('One booking') and enumerates the returned fields (product, visit date, tickets, price paid, cancel/reschedule eligibility). An agent can distinguish it from siblings like tiqets_list_bookings or tiqets_cancel_booking without inspecting schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly routes the agent: 'Check it before cancel_booking or reschedule_booking,' tying this read to the mutation siblings. It does not, however, state when to use this over tiqets_list_bookings beyond the singular-vs-plural distinction implied by the name.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.